| 英文摘要 | 第1-3页 |
| 中文摘要 | 第3-6页 |
| Chapter Ⅰ General Introduction | 第6-14页 |
| 1．1 Preliminary | 第6-8页 |
| 1．2 Aim of the Study | 第8-9页 |
| 1．3 Methods of the Study | 第9-12页 |
| 1．3．1 The Employment of Corpus Data | 第9-10页 |
| 1．3．2 Computer Programs Used for the Analysis of Text Corpora | 第10-12页 |
| 1．4 Layout of the Paper | 第12-14页 |
| Chapter Ⅱ An Overview of Vague Expressions | 第14-45页 |
| 2．1 Definitions Concerning Vague Expressions | 第14-22页 |
| 2．1．1 Vagueness in General | 第14-20页 |
| 2．1．2 A Working Definition of This Paper | 第20-22页 |
| 2．2 Discriminations between Vagueness and Other Linguistic Phenomena Concerned | 第22-28页 |
| 2．2．1 Vagueness versus Ambiguity | 第22-26页 |
| 2．2．2 Vagueness versus Generality | 第26-27页 |
| 2．2．3 Vagueness versus Context-Dependence | 第27-28页 |
| 2．3 Classification of Vague Expressions | 第28-44页 |
| 2．3．1 Approximating Quantities with Approximators | 第28-33页 |
| 2．3．2 Partial Specifiers | 第33页 |
| 2．3．3 Numbers and Number Names | 第33-37页 |
| 2．3．4 Approximating Quantities with Non-numerical Vague Quantifiers | 第37-41页 |
| 2．3．5 Referring Vaguely to Categories | 第41-43页 |
| 2．3．6 Totally Vague Words | 第43-44页 |
| 2．4 Idealization in This Paper | 第44-45页 |
| Chapter Ⅲ Quantitative Analysis and Discussion of Vague Expressions in NEC | 第45-89页 |
| 3．1 Quantitative Analyses of Vague Expressions in NEC as Compared with the Other Five Corpora | 第45-69页 |
| 3．1．1 Distribution and Frequency of Vague Expressions in the Six Corpora | 第45-50页 |
| 3．1．2 Distribution of Different Registers of Vague Expressions in the Six Corpora | 第50-59页 |
| 3．1．3 Distribution of Vague Words and Vague Expressions in NEC and the Other Five Corpora | 第59-69页 |
| 3．2 Discussion of Vague Expressions in NEC | 第69-89页 |
| 3．2．1 Approximators in NEC | 第70-74页 |
| 3．2．2 Partial Specifiers in NEC | 第74-77页 |
| 3．2．3 Non-numerical Quantifiers in NEC | 第77-83页 |
| 3．2．4 Number Names in NEC | 第83-87页 |
| 3．2．5 Words Referring Vaguely to Categories in NEC | 第87-88页 |
| 3．2．6 Totally Vague Words in NEC | 第88-89页 |
| Chapter Ⅳ Conclusion | 第89-93页 |
| 1 Conclusions Reached by the Comparisons with the Other Five Corpora | 第89-90页 |
| 2 Implications for the Teaching and Learning of Nautical English | 第90-93页 |
| Acknowledgments | 第93-94页 |
| Bibliography | 第94-98页 |
| Appendix | 第98-106页 |
